492691789 has 2 divisors, whose sum is σ = 492691790. Its totient is φ = 492691788.

The previous prime is 492691783. The next prime is 492691813. The reversal of 492691789 is 987196294.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 390378564 + 102313225 = 19758^2 + 10115^2 .

It is a cyclic number.

It is not a de Polignac number, because 492691789 - 2¹⁵ = 492659021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (492691783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246345894 + 246345895.

It is an arithmetic number, because the mean of its divisors is an integer number (246345895).

Almost surely, 2^492691789 is an apocalyptic number.

It is an amenable number.

492691789 is a deficient number, since it is larger than the sum of its proper divisors (1).

492691789 is an equidigital number, since it uses as much as digits as its factorization.

492691789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 55.

The square root of 492691789 is about 22196.6616634124. The cubic root of 492691789 is about 789.8145102083.

The spelling of 492691789 in words is "four hundred ninety-two million, six hundred ninety-one thousand, seven hundred eighty-nine".